31220403045 has 64 divisors (see below), whose sum is σ = 55447628544. Its totient is φ = 14902548480.

The previous prime is 31220403043. The next prime is 31220403047. The reversal of 31220403045 is 54030402213.

It is an interprime number because it is at equal distance from previous prime (31220403043) and next prime (31220403047).

It is not a de Polignac number, because 31220403045 - 2¹ = 31220403043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220403041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1291207 + ... + 1315163.

It is an arithmetic number, because the mean of its divisors is an integer number (866369196).

Almost surely, 2^31220403045 is an apocalyptic number.

It is an amenable number.

31220403045 is a deficient number, since it is larger than the sum of its proper divisors (24227225499).

31220403045 is a wasteful number, since it uses less digits than its factorization.

31220403045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24182.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 31220403045 its reverse (54030402213), we get a palindrome (85250805258).

The spelling of 31220403045 in words is "thirty-one billion, two hundred twenty million, four hundred three thousand, forty-five".